Coordinates on the form

Question

I am a newbie to Java and I messing around trying to learn stuff. I am trying to make a small program that has one string message and it displays the coordinates of the form as you move the mouse but my code will not work, the message just stays at the default coordinates. Someone help. Here is my code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class HelloJava2
public static void main( String[] args ) {
JFrame frame = new JFrame ( "Hello Java2" );
frame.getContentPane().add( new HelloComponent2( ) );
frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
frame.setSize( 300, 300 );
frame.setVisible( true );
class HelloComponent2 extends JComponent
implements MouseMotionListener
String theMessage;
int messageX = 125, messageY = 95;
public void paintComponent( Graphics g ) {
g.drawString( messageX + "," + messageY, 125, 95 );
public void mouseDragged( MouseEvent e ) {}
public void mouseMoved(MouseEvent e) {
messageX = e.getX();
messageY = e.getY();
repaint();
}

Answer 1

The coordinatesdon't change because there is no MouseMotionListener. So you need to add one in a contructor for your HelloComponent2 class:
public HelloComponent2() {
    addMouseMotionListener(this);
}